Flight History
On 30 August 2022, a Cessna 208B EX aircraft, registered PK-SNW, operated by PT Smart Cakrawala Aviation (Smart Aviation), was conducting unscheduled cargo and passenger flights. The aircraft departed Timika at 0326 UTC (1226 LT) for Sinak, performing its seventh flight of the day. It climbed to a cruising altitude of 13,000 feet.
Accident Sequence
According to flight data recorder parameters, the aircraft approached Sinak Airport with a high descent rate and excessive airspeed. The approach was not stabilized. During landing, the aircraft bounced and then porpoised. The pilot attempted to recover but applied brakes improperly, leading to a loss of directional control. The aircraft departed the runway and came to a stop. The nose section and propeller were damaged.
Aircraft Information
The aircraft was a Cessna 208B EX, equipped with a single engine and a Garmin G1000 system including a terrain avoidance warning system and stall warning. The stall warning system was functional. The aircraft's weight and balance were within limits.
Aerodrome Information
Sinak Airport is located in Papua, Indonesia. The approach chart indicated a short runway with surrounding terrain. The pilot was familiar with the airport.
Findings
The investigation found that the pilot did not perform a go-around when the approach was not stabilized. The approach was flown with excessive speed and a high descent rate. The landing resulted in a bounce and porpoise. The pilot's improper brake application contributed to the loss of control. Additionally, the pilot may have been under mental pressure due to multiple flights and fatigue, which influenced decision-making.
Contributing Factors
The contributing factors identified were: the pilot's failure to execute a go-around during an unstabilized approach; an approach with excessive speed and high descent rate; a bounced landing followed by porpoising; and improper brake application leading to loss of control.